// Tyler Rigsby, CSE 142
// Computes several students' section attendance scores from
// poorly formatted data using array tallying

import java.util.*;
import java.io.*;

public class SectionAttendance {

    // constants? 
    public static void main(String[] args) throws FileNotFoundException {
        // make scanner
        // loop over each line (section):
        //     get points for each
        //     get percentages for each
        //     report results
        
        Scanner input = new Scanner(new File("sections.txt"));
        int section = 0;
        while (input.hasNextLine()) {
            String line = input.nextLine();
            section++;
            int[] studentPoints = getPoints(line);
            double[] studentPercentages = new double[studentPoints.length];
            double average = getPercentages(studentPoints, studentPercentages);
            reportResults(section, studentPoints, studentPercentages, average);
        }
    }
    
    // Takes a line containing student grades as a parameter, and returns
    // an integer array containing the points that each student received.
    public static int[] getPoints(String line) {
        int[] counts = new int[5];
        for (int i = 0; i < line.length(); i++) {
            char c = line.charAt(i);
            
            int points = 0;
            if (c == 'y') {
                points = 3;
            } else if (c == 'n') {
                points = 1;
            }
            
            int student = i % 5;
            counts[student] += points;
            
            if (counts[student] > 20) {
                counts[student] = 20;
            }
        }
        return counts;
    }
    
    // Takes an integer array containing each students' points and a double array of the same
    // size and fills the double array with each student's grades given 20 points possible. Returns
    // the average grade among all students.
    public static double getPercentages(int[] studentPoints, double[] percentages) {
        double sum = 0.0;
        for (int i = 0; i < percentages.length; i++) {
            percentages[i] = 100.0 * studentPoints[i] / 20.0;
            sum += percentages[i];
        }
        return sum / percentages.length;
    }
    
    // Takes the section number, students' points, grades, and section average as parameters,
    // and prints the statistics about the section.
    public static void reportResults(int section, int[] points, double[] percentages, double average) {
        System.out.println("Section #" + section + ":");
        System.out.println("Student Points: " + Arrays.toString(points));
        System.out.println("Student Grades: " + Arrays.toString(percentages)); 
        System.out.println("Section average: " + average);
        System.out.println();
    }
    
}